Kappa Virginis
 Location of κ Virginis |
|
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Virgo |
| Right ascension | 14h 12m 53.74538s |
| Declination | −10° 16′ 25.3340″ |
| Apparent magnitude (V) | 4.180 |
| Characteristics | |
| Spectral type | K2/3 III |
| U−B color index | +1.457 |
| B−V color index | +1.343 |
| Astrometry | |
| Radial velocity (Rv) | −4.38±0.21 km/s |
| Proper motion (μ) |
RA: +7.25 mas/yr Dec.: +139.88 mas/yr |
| Parallax (π) | 12.80 ± 0.25mas |
| Distance | 255 ± 5 ly (78 ± 2 pc) |
| Details | |
| Mass | 1.46±0.04 M☉ |
| Radius | 25.41±0.74 R☉ |
| Luminosity | 229 L☉ |
| Surface gravity (log g) | 1.83±0.08 cgs |
| Temperature | 4235±20 K |
| Metallicity [Fe/H] | −0.43±0.04 dex |
| Rotational velocity (v sin i) | 5.1 km/s |
| Age | 9.67±0.97 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Kappa Virginis (κ Vir, κ Virginis) is a solitary star in the zodiac constellation of Virgo. It has an apparent visual magnitude of 4.18, which is sufficiently bright to be seen with the naked eye. Based upon stellar parallax measurements, the distance to this star is about 255 light years.
This is an orange-hued K-type giant star with a stellar classification of K2/3 III. It has about 146% of the mass of the Sun, but at an estimated age of 9.7 billion years it has evolved and expanded to over 25 times the Sun's radius. As a consequence, it shines with around 229 times the solar luminosity. The effective temperature of the star's outer atmosphere is 4,235 K.
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